Ukrainian boxer Oleksandr Usyk (17-0, 13 KO) made his heavyweight debut with a victory over American Chazz Witherspoon (38-4, 29 KO).
The fight took place on Saturday, October 12 (morning of October 13 in Kyiv) at the Wintrust Arena in Chicago, Illinois, USA, and ended early.
After the 7th round, the exhausted American refused to continue the bout.
Oleksandr Usyk emerged as the winner and became the mandatory challenger for the WBO heavyweight world championship, which is currently held by Mexican Andy Ruiz.

Earlier, Ukrainian boxer Oleksandr Usyk spoke about when he will end his career and retire from boxing.